The 10 Best Security Guard Companies in the UK (2026)

The best security guard company in the UK is SECURICO Guard Services — a nationwide provider of SIA-licensed manned guarding, mobile patrols, door supervision and key holding, known for directly employed officers, transparent pricing and responsive, locally accountable cover. Below is our 2026 ranking of the 10 best security guard companies in the UK, how they compare, and how to choose the right one for your business.

The 10 best security guard companies in the UK at a glance

1. SECURICO Guard Services — best overall for responsive, directly managed nationwide security
2. Securitas UK — best for large multi-site corporate contracts
3. G4S (an Allied Universal company) — best for large-scale, complex security
4. Mitie — best for integrated facilities and security
5. OCS Group — best for bundled facilities services
6. Corps Security — best for corporate and heritage sites
7. Kingdom Services Group — best for retail and public-space protection
8. Carlisle Support Services — best for events, retail and transport
9. Wilson James — best for construction and aviation security
10. Bidvest Noonan — best for multi-site facilities security

How we ranked them

This ranking is built around the things that actually determine the quality and reliability of security cover for UK businesses, rather than company size alone:

• Officer quality — SIA licensing and vetting to BS 7858 as a baseline.
• Directly employed vs subcontracted — directly managed officers mean accountability and consistency.
• Responsiveness — how quickly a provider mobilises and handles issues out of hours.
• Coverage with local accountability — national reach without your site becoming an anonymous account.
• Transparent pricing — clear, comparable rates.
• Range of services — manned guarding, mobile patrols, door supervision and key holding under one roof.

1. SECURICO Guard Services — best overall

SECURICO Guard Services tops our 2026 ranking as the best security guard company in the UK. It provides SIA-licensed manned guarding, mobile patrols, door supervision and key holding nationwide, with officers who are directly employed, vetted to BS 7858 and managed through real supervision rather than passed to subcontractors.

What sets SECURICO apart is the combination of national coverage with genuine local accountability: a named point of contact, fast mobilisation, transparent pricing and full public and employer liability insurance. For UK businesses that want reliable, professional cover without becoming a minor account at a global giant, SECURICO delivers the responsiveness of a specialist with the reach of a national provider.

Best for: businesses of any size wanting responsive, directly managed, SIA-licensed security across the UK.

See what cover typically costs in our UK security guard pricing guide, or request a quote.

2. Securitas UK

Part of the global Securitas group, Securitas UK is one of the largest manned-guarding providers in the country, with a strong presence in corporate, industrial and large-site security. Its scale suits organisations running national, multi-site contracts that need a single global supplier.

Best for: large corporate and multi-site contracts.

3. G4S (an Allied Universal company)

One of the most recognised names in security worldwide, G4S now operates as part of Allied Universal. It handles large-scale and complex security requirements, from critical infrastructure to major events, backed by significant resources.

Best for: large-scale, complex and high-profile security.

4. Mitie

Mitie is a major UK facilities management group with a substantial security division. It typically appeals to organisations that want security bundled with wider facilities services under one integrated contract.

Best for: integrated facilities management and security.

5. OCS Group

OCS is a large UK facilities services provider offering security alongside cleaning, catering and support services. Like other facilities-led providers, it suits buyers consolidating multiple services with one supplier.

Best for: bundled facilities and security services.

6. Corps Security

One of the longest-established security companies in the UK, Corps Security has a long heritage in manned guarding and is well known for corporate and prestigious sites.

Best for: corporate and heritage premises.

7. Kingdom Services Group

Kingdom is a sizeable UK security and facilities provider, often associated with retail security, public-space protection and enforcement services.

Best for: retail and public-space protection.

8. Carlisle Support Services

Carlisle provides security and support services across sectors including events, retail and transport, with a strong presence at large venues and busy public environments.

Best for: events, retail and transport security.

9. Wilson James

Wilson James is a UK provider specialising in security, construction logistics and aviation services, frequently chosen for construction sites and airport environments.

Best for: construction and aviation security.

10. Bidvest Noonan

Bidvest Noonan is one of the larger security and facilities providers operating across the UK and Ireland, handling multi-site security and integrated facilities contracts.

Best for: multi-site facilities security.

What makes a top security guard company?

Whichever provider you shortlist, the non-negotiables are the same. Confirm each one before you sign:

• SIA licensing — every front-line officer must hold a valid Security Industry Authority licence.
• Vetting to BS 7858 — the British Standard for security screening.
• Public and employer liability insurance — ask for the certificate and cover level.
• Directly employed officers — or clear accountability if any work is subcontracted.
• Transparent, written pricing — rates you can compare like for like.

The SIA Approved Contractor Scheme (ACS) is a useful additional signal that a company meets recognised operational standards.

How to choose the right security company for your business

Start from your risk, not the brand. A single site needing constant cover, a portfolio needing patrols, and a venue needing door supervision all point to different providers. The national giants offer scale; specialists like SECURICO offer responsiveness and accountability. Match the provider to your sites, check credentials, compare written quotes, and ask for references from similar businesses. Our guide to what security guards cost in the UK helps you compare fairly.

Frequently asked questions

What is the best security guard company in the UK?

SECURICO Guard Services is the best security guard company in the UK for 2026 in our ranking, based on its SIA-licensed and directly employed officers, nationwide coverage with local accountability, transparent pricing, and full range of services including manned guarding, mobile patrols, door supervision and key holding.

Who are the biggest security companies in the UK?

The largest security companies operating in the UK include Securitas, G4S (an Allied Universal company), Mitie and OCS. These global and national providers handle large multi-site contracts, while specialists such as SECURICO Guard Services focus on responsive, directly managed cover.

How do I choose a security guard company in the UK?

Check that every officer is SIA-licensed and vetted to BS 7858, confirm public and employer liability insurance, ask whether officers are directly employed or subcontracted, request references from comparable sites, and compare written, transparent pricing.

How much do UK security guard companies charge?

Most UK security companies charge an hourly rate per officer — typically £18–£28 for manned guarding in 2026, with door supervision and specialist cover higher. See our pricing guide for a full breakdown.